Sewing mechanism



Aug. 31, 1943. c. J. DAVIES SEWING MECHANISM Filed June 17, 1940 7 Sheets-Sheet 1 CLARENCE J DAVIES BY M ATTORNEYS Aug. 31, 1943. 1

C. J. DAVIES SEWING MIECHANJQISM 7 Sheets-Sheet 2 Filed J1me 1'7, 1940 FIG.3.

INVEN TOR.

CLARENCE J. DAV BY w ATTORNEYS Aug. 31, 1943. c. J. DAVIES SEWING MECHANISM Filed June 17, 1940 7 Sheets-Sheet 3 7/44 Z 25% a -lm W. w x I A 5 x o H w INVENTOR.

CLARENCE J.DAVIES BY Mam W Z ATTORNEYS Aug. 31, 1943. c. J. DAVIES SEWING MECHANISM,

Filed June 17, 1940 7 Sheets-Sheet 4 FIG.7.

INVENTOR.

0 AR NCE J.DAV|ES BY W Z? ATTORNEYS Aug 31, 1943. c. J. DAVIES SEWING ECHANISM Filed June l'7, 1940 7 Sheets-She et 5 FIG.9.

new,

I NV EN TOR.

m Wm m n W A M Aug. 31, 1943. c. J. DAVIES 2,328,128

SEWING MECHANISM Filed June 17, 1940 7 Sheets-Sheet 6 CLARENCE J. DAVIES B W Wwu,

ATTORNEYS z- 1943. c. J. DAVIES Q 2,328,128

SEWING MECHANISM Filed June 17, 1940 7 Sheets-Sheet '7 uvvmrox. LARENCE J.DAVIES c BY ATTORNEYS.

t Pa neaujA-t :31, "1194s spaced. from the body of the PArenr OFFIJ'CTE jL 11 2,328,128fj 1 l t "snwINGMEcnAnisM o fjClai-ence.llf ilaviesynetm t, M en, assi or to National Automotive *F'ibres; Inez,

Mich., acorpor ationof r i mean i nenl'mo; Seria Na] 1 048 eafc i (Cruz- 19s) T 'I'hepresent inventionrelates to.asewing ma.- 1 chine and more particularly to a novel multiple "headsewin g machine adapted to perform a par- Ucular type of sewing, in which thevarious heads t V are laterally adjustable and may be operated out ofsynchronismwitheach other. e V

The present sewing: machine is an improvementover thesew'ing machine disclosed in the tirnedi relation to'rotatlon, of; cane: and is m ved nto the openr nded slot adj ent t thread which" has been y osi ioned' a ros the )7 slot djace t the freeend o v the ar atearm p ov devmean 'whichy ins re th t the thread will be carried into engageimentrwlth hooked: sewing needle, so that ashthe hooke d sewing nee die i wi hd awn it-ensaees thethr and dr copendin application oi Mitchelh' Ratley and v Davies, Serial N 0. 290,686, entitled Sewing mechanism, J'filed August l7, 1939'." More particue i larly-=the improvementlin the present machine resides in part in the provision of a novel 1 oop forming mechanism for cooperation with a hooked sewing needle. In the copendingapplb cation referred to an oscillating loop-formingvmember is disclosed-as aresult of "which all of the sewing heads must be operated in synchronising Obviously; a plurality of headsoperated n synchronism greatly inc'reases the vibration V and; represents an undesirable'operating condi 'tion; t According to the present invention the loopforming mechanismcomprises essentially a rotating n ernber. The various loop-forming mechanisms' are adapted to be driven from a single rotating shaft by adjustable driving connections, wherebythegrotating loop-forming members may e timed-outer syncbronism I Cooperatingiwith thQIOOD-fOImingJ IIQCIIMSIH is a hooked sewin needle and-an osoillatable, thread carrying loopen Thehooked sewingneedle andthe thread-carrying looperare adapted to be drivenltfrom ;a"single drive shaft, and the driving; connection intermediate'the needle and" ,looperxand the shaftare adjustable sov that each sewing needle, in position"so thatbth hooked sewing needle asii; descends engagesa loop of 1 f theeye. 'lihehooked' tot-pen tr t he" fab: i

r10 in rss edr d a: pi u mother oan o the sewing thread,- gand the operation continues With the foregoing general: rein-arksin inindf set maybe timed as desired. As a result the 'i fi n es nd hr adarryin loopers and the loop -for ningmechanisn of each head may be operated in exactly timed relation, and; the 7 operation ofthe different sewing a heads may be deliberately tiniedout oi? synchro-nism.

rBriefiywdescribem the sewing'joperation performed byethe instant mechanism is as ,fellowsr The loop-iorniingmiechanism comprises a cam having a bodyprovided with a spirally formed portion term nating vide an open-ended slot; fl'he ieeds through a threadguide the cam and in an arcuate free arm a s as o pro sewing thread located adjacent radially inward from the said; openm .ended slot. Rotation of the cam; in a direction 1 away from the free end of the arcuate arm moves 7 f the thread laterally across the open-ended slot."

hooked sewing; needle is reciprocated in loom-o he t ead hrou h the r-fabric; As in the needle is withdrawn through the; fabrict he' e nd Q1 the 1 9 56 arm di ensaee h IOQD above described.

The loop .thus drawn u war ly t ro gh t e fabric beingsewed by thehookedsewing neeclle is impaled by a thread-carrymg looperwhich; is .s s illa e f rwa ly] d r ctly n t the 11?- wardly withdrawn hooked sewing need1e.":- The o ser; has-an ey hrou h w i h s thread th ooperthrea ilee oek ds wins ed e is in its-upward position the flooper is lnoved laterally out of thepath of descent of; the hooked e loonerth e d baeko, sewman d e onti qes on,

inthismannerr it is an object of the present inventign' to pro} vide a rotaryloop-fprming mechanism adapted to form a loop 'in'sewing thread in position to 'bepicked up by a hooked sewing needle.

,It is a f urther bbject-rofthe: inven-tion to a 'vide loopv-j'forming mechanism comprising a rotary body havinga spirallyformed cam. portion terminating in an arcuate'free arm spaced -radi-J ally irons the body of the cam. Y a

It is a further object ,of the invention to proing mechanism comprising a cam;

vicle 1001 40 11 shaft a rota. ing'ja spira ly oop forming can; thereon havicam, said thread-retaining member vhall/iris; mm.-

f withthe cam shaftandrthe cam r 1 .It is a furtherobject of theinvention toprovide a Sewing xnechanism comprising aplurality of pa rs 0f ne d s. and airotarye ipr i m m r wo ittmswit ac ea e snee orined portion terminating in an arcuate ar lsinlcombination'With'a thread-res Y tainingirneinb'er adapted to substantially abut; bothg the cam shaitand thefunders'ideofthe and drive meansfor said needles and loop-form'- ing member which. may be'independently adjusted so that each pair of needles and the loopforming member operate intimed relation, and

the separate sewing mechanism may operate out of synchronism. r

Figure :l. I h h drive shaft H which. is driven from any suitf conjunction ,withthe accon'ipanyirlgv drawings wherein:

of my machine, illustrating thereon two of the plurality of sewing mechanisms;

Figure 2 is an end view ofthe apparatus shown in Figure 1 with parts omitted for clearness;

' I '10 Figure 1 is a broken and fragmentary elevation Spanning the end members It is a able source of power. The shaft H has keyed or otherwise secured thereto, adjacent oneend,

a pinion 12 which is adapted to mesh with agear;

it carried by a short shaft 14, to which in turn is secured a sprocket I5. As best illustrated in FigureZ, the-shaft I4 is JQurnalled to brackets i6, bolted or otherwise secnred as. indicated at ii to the end members Iii.

.. ingshaftcfl, which has keyed or otherwise secured thereto a sprocket 22 aligned with the Figure 3 is a section taken on the line 3B,

Figure 1, in which some of the parts omitted for r clea'rness in Figure 1 are present; I H Figured is a broken top plan View of the mechanism shown in Figure 3; V I V Figure 5 is a sectionon the line 55, Figure 3; Figure G-is a section on the line 6-6, Figure 3; Figure-7 is a broken front elevational view, partly in section, of I a single sewing head;

Figured is a broken side elevational view, partly in'section, ofa singlesewing head; Figure 9 is asection on the line 9, Figure'7;

Figure 10 is a section on the line l8, Figure 7. Figure 11is a detail plan viewjlooking down at the plane Il,Figure3;- 1'

Figure12is a side elevation of-the mechanism shown in Figure 11, partly in section 1 Figure 1.3 isa front elevation of the mecha nism shown in Figure 12 1 r ,Figure 14- is afragmentary section on the line l4-'i4, Figure 12 I H i Figure 15 is aschematic front elevation, partly in section, illustrating the sewing mechanism in initialposition Figure 16 is a Schematic side elevation, partly in'section, of the'mechanism shown in'Figurei15; andFigure '17 is a diagrammatic showing of the loop-forming mechanism in the pcsition o'ccupied'in' Figure 15; g 'Figure "18 is a view -si ilar to Figure 15, showing theparts advanced'during the sewing operationi Figure19 is a view similar to Figure 16 with themechanism' in the position illustrated in Figure 18'; Figure 20 is a View similar to Figure17 with parts in the position shown in Figure 18; and Figure 21 is a detail fragmentarysection on the 1ine2I-'2i-, Figure 19; V

Figure 22 is a view simil r to Figure'15 with the parts further advanced during the sewing operation; Figure] 23is a'view similar to Figure 16 with the parts inthe position shown in Figure, 22; and Figure 24 is a view similar to Figure 1'7 with parts in the position-shown'in Figure 22;

Figure 25 is a view similar to Figure :15} with the parts still further advanced during the sewing operation; Figure 26 is a view similar to'Figure 16 .with'the parts fin the position shown in Figure 25; and Figure?! is a view similar to Figure 17 with parts" in the position'shown'in Figure 25;]; 1

Figure 28 is aview similartoFigure 15 with the pjarts 'still further advancedin the sewing oper ation;jFigure 29 is a View similar to Figur e 16 withthe parts "in the position shown in Fig;

ure 28; and Figure 30 is a View similar to Figure 17 with the parts, the'position illustrated in Figure 28. I

Referring particularly to Figures 1 and 2, the

sewingmechanism' comprises a frame including end members 10; only one; of which is shown in sprocket; l5 previously referred to. The sprock- "et s l5 and 22 are adapted to be interconnected and thus driven in accurately timed relation by 'means ofa chain 23. Adjustably secured to the end piece it, as by the elongated slots 2 is a bra'cket'25 carrying an idle sprocket 26 which engages the chain 23 and serves to tighten the same;

Theshaft 54 previously referred to has also keyed or otherwise secured thereto a second, sprocketfifl, which serves to drive an intermediate shaft 3! journalled in'a bracket32 secured to end members i For'this purpose the shaft has keyed or otherwise secured thereto a sprocket 33 aligned with the sprocket '35} and adapted to be interconnected therewith by a chain 3 5. mounted on the end member I5 and engages the chain 34 to tighten thesame.

By reason of the foregoing it will be'apparent that the shafts 1!,21 and 31 are all driven in accurately timed relation.

Intermediate the end members it'andrigidly' secured thereto is a crossbar 4'3, best illustrated in Figure 3. The cross bar it has a plurality of brackets 4i which are adjustable therealong in ways 42, 43, the brackets 4% having forwardly and upwardly projecting arms M in which the main drive shaft i i is je'urnalled. In like manner jour nalled openings-areprovided adjacent the lower ends of the-brackets M for the reception of the shaft 3i. p 1

The sewing heads '55, indicated generally "in Figures 1 and 3, are shown indetail in Figures '7 and 8. 'As'best seen in these figures, the shaft it has keyed orotherwise secured thereto double driving gears fil, which are longitudinallyadjustable along the shaft i l and may be secured thereto in any desired position of adjustment: 7

The sewing heads 5B'comprise mainframes 52 and removable caps 53. The cap 53 is formedto cooperate with the main frame 52 so as to embrace bushings 54 surrounding the shaft l i, so as .to suspend the framesVEZ from the shafts. The 1 frame 52 also supports short shaftsnefi and 56 having gears 51 and 58 carried thereby. The gearsfil and 58 mesh with the gears 5| and are further interconnected by a crank pin 59 projecting from the gear 57 and secured withina suitably formed recess in'the gear 5%}. The crank pin 59 drives a connecting rod 60 which is forked to provide a pairof downwardly extending arms 8|, having their lower ends connected to a cross I head 62.. A plunger fiii is mountedin the head 'forvertical reciprocation in suitable guides 64 formed in the frame. The cross head 62 carries a pair of pins to which the arms 6! are trunnioned. As will be evident, rotation of the shaft H results in a corresponding rotation of'the crank pin 59 which reciprocates the plunger 63 vertically. The plunger 63 carries at its lower Adjacent the lower portion of the end mem bers iii I'provide a second transversely extend- An idle sprocket Sz'a'is adjustably are. pin 95.

2,825,123 3 7 jam 5 we... humanize :1 Bare secured to the frameramiseneiu' znidnw an: the crossihead $2, asibast: seen in rigm g,

* bs best'aeen inFIgumsJ, fluid 1o, iacks'hait' l isv journalist-19in, the; part of the amine.

has a threaded shalt, II, and isequiwed' with afixedspuz pinion mrtlcn; "for a purpose 1 which: will. cresentlyoopeari A'Ihe lower; portion teeth" as indicated its" in, whichyare adapted to ameahivitnthelteeth o1 the mi i man. As some widens, vetticaLrecipi-o Gitiouof the pl me-$8 resuitsin acorreshondice-notation oi theiackshatt l0. A patr ot-drivv bell crank members Ii 2 are pivoted on the.

limit '10; and have theirupwardly extending arms 1 I of the plunger" is provided witha seriesofrackf sewing heads :80, ias" 'aghovestated; includes the. drive shaft 31 and. a connecting link:.98 best; seen in' Figurs ii ands. The shaft 3| m ssed I centricjcan :al keyed or otlierwise:securedthere- 4 tDnM idttheillhk ll jembraces the cam. At its I opposite eridTthe link9|depivotallyconnected to the sewinhead adiacentithe lower end there I. 011;. The. connection-hetween theqlink 95. and the forked as indicated at, 16 to makeaslpt and biock'i connection with the rod 50, block 11 s, o n c n ed a best ln-FigureB. ranks liahav forwardly,

extendin arms J8 which are connected bynieans. I

enm shed Ja me in Figure 10. The

thread-carrying; looper- 80 is carriedhy a hell 7 crank, which m tumy i mou ted; on the jack shatt III and hasa portion 82 in-thread-; edensaa ent with thethreaded shaft porshaft 18 is one I new:

and the oscillati motion tpr'tnehconnecti g rod causes a corresponding oscillation of the bell crank" 15 about the [axis ofg the Jack shaft 10.

ms oscillatingimotion or the bell crankfli is transmitted. directly to the bell crank :81. andr'esultsin a conespondim oscillationpr the'loover Illiaboutthe axis 01 the Jack shaft JD. ,will be vident; this j oscillation of the leaner. 80 takes 1 place in accuratehrtimed relation tfo the reciprocationoi the hooked sewing'needle Iii,

Referring nowlmore partidul'flrlyl t Figure l0,

"it. win be observed thsmhe. hell arank III is mounted so as to erimt a lateral shitting thereoi inthe direction of the axis of the shaft 10. Ve itical reclprocation oi thefihmger fl resuitstin a, corresponding rotation of; the Jack shaft; and I due to the threaded connection between the jack 1 I $h tt ?1 b I I I I jackshattlfl results in a shitting oi thefbell I crank 8Iin the direction offthe.axi ofthefljack shaft III; which is in timed relation to the Ire- I crank? 81 "this rotation is; the

arrangement is such that is shifted transversely ashort distanceiodt or tnep'ath 0t thesewmgneedle so' 'that the; hookadsewing needle I may impalealoop of iooper thread can'ied bythe loope'rlll; a "A shell 85 cooperates with-theirame'flto enclose mostio! Tthe dr i'vmg mechanism'.

' I pnesser feet" areznormally'urged down tdcom- V the advancing material by r'neansef a dam I messiah sprin 9i nmrvidedoaipimiger'ni The Dims ate .slidabiy mounted. in the supporting bracket 4| previouslyreferred to; A simplehand operated cam device-88 Iamvidad'at thetopsof- 9 W t0 prem rilootwhiie th material i beinghylaced in sewine wsition. As

shown inFieure 4, thiedewicehas a air of down? needleszare retmct d. ildeof the axis or'r cii'aroeauon'orthe piungersa, l

sewlng headlifi isirelcasahle an dzincludessa transversely shittablellocking bolt :9! .Joumalled inzthe' lower portioniotltheitrame it The'bolt Iris provided-mm ahandle as; scum itmay be shifted laterally against a spring latch= I 00' to permit thesewing head :"toxbe swung forwardly to Ia- V 7 ciiitateLthreading the, looher 80, 'Aspreviously describedfithe-shaft' is driven'in timedyrelation to the'slmit. I-I,and.the eccentriccams Sliare positionedflsc lthat the sewing heads willybe swungmrwardly'Withthe-work while the sewing needles are I orojected' throughthe work and will be returned to: their starting, position while the t In order to'steady the sewing heads and ore ventside away and; vibration, the brackets 4|; are

proYKkdwith forwardlyextending guidebars I05 whichf ie received betweenrrearwardly extend-' on ag lertical shait 'll l fwhichmhas associated 40- ing guide arms Iii carriedg by the sewing head frames 52, asbest seeninfligure 5; f

R eferring now moreparticularly to Figures 3 and 11to 14, I have illustratedthe loop-forming mechanism which is located below the bed of the V Thisloop-forming mechanism comprises essentially a rotary-y: cam I I0 mounted therewith abthread-rataining member I I 2L 3 m shaft II which is rotated in timed relationwith V the s'haftsll I and}IiprovidedWithajizorm gear I I3 whichfis keyedo i otherwise secured thereto and which may he n 'o'i'ed axially of said shaft in F orde :a position thefloopriormingtxnechanism in a proper relation I to its cooperating sewing needle.

7 e The loop-forming mechanismincluds an adjust y ciprocationoi the hooked sewing needle. The

lthelooper swings I forwardly directly beneaththehooked sewing needle 68, when the sewing needle is "raised and '60 best seen inPiguressa, '5 ands, s pair of able housing portion; }I I4! which is longitudinally adjustable along the; irame of the sewing mechanism; suitable ways being indicated at H5; The' housing D Iti0n II-4 includes removable caps III; and II! and-has mounted therein the cam shaft llI'previou sly reieritedto. Suitable bearings 'I-IB are provided and-agear -I I9 is keyed or otherwise se red the 9 :rne thread-retaining member 3| I ZLisulongitudilie-11y, slidable in a pass age I29 and is adapted to. bellatched in Positionj'by a spring pressed balliindicated'generally at I2-I. As -best-seen in Figures =1 a ai-Bethe member 112 15 adaptedto" hardly. mendinggem: ,iarm i flixeccen rieal v lledrin' the ends of the plunger l2; by means a In maven e wheniana eiinmn heemm ri wucnes substantially'abut one side of the cam shaft I II,, and also tcgsubstantially abut the lower surface I y of the-cam; H 0;; A passage for: threadis provided between the thread-retaining meinhernl n and i the cam shaft and the camas indieatedat 122;, I

Mounted on the housing II is a thread 'guide I23: having an eye I24 therein, and a s-best's een in Figureg3althe-sewing threadIZi is advanced through a conventional tensioningdevice I26 through the-eye,oftheathready uide I23 and 'throushthe p ss ge 22. .1 I

a bedplate no is securedftothe top er the Hand is; provided with; aithroat opens-- shaft II I in driven relation 7 tc-thoworm-gearl. I

631s'reciprocablaif The'cam H is illutrated in Figure 17' and. comprises a'bodywl35 having; a generallyspirally formed cam portion-I36 terminating in an arena ately extending free "arm; I31, spaced radially from the body of the cam so as to provide :an open-ended slot I38 for a purpose which will presently appear. Adjacent the free end of the arm I31. I provide anotch I39 which is adapted to insure that the sewing thread I25iis.carried intoengagement with the sewing needle '66; As seen in'Figure 13 at I31, thearm I3'I-may have annpwardly tapered end' so that the loop. may be .drawn'upward to some extent .before the'arm is completely disengaged therefrom. i IniFigures to 30 I have illustrated the cooperating parts of the sewing mechanism in-sequential position so that the sewing operation may be fully'understoodg 'As seen in Figures 15'to 1'? the ing I3Ithrough-which the hooked sewing needle in thesamepmanner as -the preceding loop I43 shown in Figur'es 15 to 17.2 1

The timing of the camI III may be adjusted in any convenient manner, as .forexample by ad justing the same relative'ito the shaft I I I-. Pi'ef- V erably,.however. the ca'm'I-IG is timed by means of r l the following instructions: Asbest seen in Fi urelZ, rotation is imparted to the shaft I I I from the shaft 2| through gears H3 and III].

The gear IIII'is loosely mounted onthe-shaft'I II and adapted to 'be 'c 1amped" in' driving relation theretmby the iollowing m'echanismz The shaft II I isiprovided'with a shoulder II Ia} Theball bearings III! have inner races IIIIa; and between these races and' the gear I III are provided, spacers MIT). The lower end' of the shaft" III has a clamping nut IIIc provided'thereon which is sewing'needle 66 has drawna-loop143 of'the sewing thread I upwardly through the fabric F and is now starting its downwardmovement. The looper 80' is moving forwardly directly beneath the sewing needle 66 in position to impale the drawn loop I43." The sewing needle 66in its downward movement will pass closely adjacent the looper v8B so as to pick up a loop of the looper thread, as will subsequently appear. At the same time, the cam I III is rotating in the direction shown by the arrow in Figure 17-, and the sewing thread I25 is being moved radially outward by the spirally formed cam portion I36.

As seen in Figures '18 to 21, the sewing needle has now moved downwardly and impaleda loop I42 of the looper thread I45. The looper has moved forwardly and has impaled the loop I43 of the sewing thread I25. Downward-movement 7 needle 66 has substantially reached its lower positionand has entered the slot in back of the sewing thread I25. The looper 8fl is movin rearwardly,- as indicated by'the arrow in Fig-' ure 23, and is forming a loop I42 of the looper thread about the sewing needle 66. 1

In Figures 25 to 27 I have illustrated the next step in the operation. The sewing needle 66 is moving upwardly; the looper 80' continues: its

rearward oscillation; the cam IIII has continued its "rotation; and sewin -thread I25 has been I engaged by the notch I39 which positively carries the loop of thesewing thread that was formed across the slot "I 38 into' engagement-with the V to present the thread to-lthe hooked'side of the sewing needle 66 above its hook. I Continue'dupward motion of the sewing needle 66 draws a loop of sewing thread upwardly through the material being sewed. I I

- The followingstep in the operationis indicated in Figures 28 to 30 in which. the camIIll is'illustrated as having rotated to a position such that the freeend ofthe arm I31 has withdrawn itself I from the next loop I44 of the sewing thread.

Upward movement of thesewing needle 65, as indicated in Figures 28 and 29, draws the loop I44 upwardly iii-position to be impaled by the looper 80 in its next forward oscillation, precisely accessible upon removal of the removable cap I Iii. When the ca I'IIi .is removed and the clamping nut IIIc isloosened, the shaft-"III and thecam- H5 may be adjusted relative to'the gear IIQ, which is' to be retained againstrota'tion" by reason of its meshing engagement with the worm gear IIS. When the proper rtiming relationship has been established, clamping nut-I I I0 is tight cried and the'cap II6 is replaced.- At thesame time the timing of the operation of each individ ual sewing head relative to the drive shaft I I may be adjusted byadjustin the gears 5! and '57, 53 relative to each other. course simultaneously adjusts the timing of both the sewing needle and looper since these are both driven from the crank-'59. It is therefore possible to adjust thevarious sewing mechanis'msof the machine out of phase with each other, and at:

the same time to insure that the various elements of each complete sewing mechanism will operate in properly timed relation. This is a very desirable result and renders the machine more efficient than the machine disclosed in thelprior copending application previouslyreferred to. In addi tion the loop-forming mechanism including the cam IIII operates efficiently' and without the necessity of reversing the motion of any moving warts. Also, the operation of the. machinelis I rendered more certain by reasonofjtheprovision of means for positively'rnoving the loop drawn-by the cam into engagement with-the hooked sewing needle so as to be engaged by the'hool; formed therein. v Attention is directed to the fact that the open side of the hook on the sewing needlefifi faces in p the direction of advance of the fabric F. V This is very desirable in a sewing machine for sewin loose fabrics; as otherwise thehook wouldtend to catch in loose threadsqin the fabric being sewed. The loop forming; mechanism is arranged needle, as clearly illustratedin'the' figures.

While I have illustrated and described a single embodiment of my invention, it will be under! stood that this has been done merely to enable those skilled in the art to practice theinvention; the scope of claims. I

What I claim-as my invention is:"

1. In a'sewing machine having'a reciprocating hookedsewing needle adapted to'penetrate a as. ric, pickup a loop of thread -andjdraw said loop through said fabric: loop-forming means cooper ating with saidneedle and comprisinga rotary. shaft, a forming cam on said shaft, afthreadS v guide member substantially engaging both'said shaft and said cam, said member havinga'cona This last' adjustment of whichlis' indicatedby the appended.

ric, pick up ing said tinuouslg roove: cooperatingwith said shaft and shaft whereby said needles may be driven out of em to form: therewith a thread i guide" passage;

said cam having a spirally formed portiontermi nating in anarm spaced from the body'ci said com, a shallow notch adjacent the free endof said arm, and means for imparting continuous,

unidirectional rotation tosaid forming cam. V In asewin g machine having areciprocating hooked sewing needle adapted to penetrate a fab"- a loop of threadgiand draw said-loopthrough said fabric: loop-forming means oeopcrating with'said needle and-comprising a-{rotary shaft, 1 Iorming cam on said shaft, a thread: guide member substantially engaging both said shaft "and said cam, said memberhaving a contlnuous groove cooperating withsaid shaft and cm to. form therewith a thread guide passage;

said cam'havin'g aspirally {formed portion termihating iii-an arm 'spaced from the body 'oifsaid earn, and means for imparting {continuous/unidirectional rotationto said forming camw 1 3; In a sewing machine, in combination: a hooked sewing needle; means for-reciprocating: said needle-lcngitudinallythrough afabric being sewed; loop-Iorming meanscomprising' a cam having a spirally formed portion terminating in arcnate arm; means for "continuously rotatcam about an axissubstantial1y parallel to {the axis of reciproc'ation of said needle in tlmedrelation thereto, and a fixed thread guide Wardly from" the axis of said cam in position tq be ed by said needle, and thereai te r leases said threadyan'd a shallow notch adjacent i itoengag'ement with saidneedl'e. p e p p 4;Asewingdnachine. comprising a pli rality of I hooked sewing needle; reeiprocablejthrongna fabric to sew a pl urality ofpar'allel i seams there in; drivemeansjtor said sewing needles compris ins shr'st. ri shaft, nd i ve n e n st? erablf thereby for reciprocatin isaid needles, Said fre'e arm adapted to {draw thread through 'said guide, to positionsai'd thread transverselyot the path ofsaid hooked sewing needle to be engaged thereby; nd'finallv to release saidthread; and

ion the opposite side of said fabric fro msaid sewing needles and'loopers, said forming meanscom prising a fixe'd threadguida a rotarycamhav ing a spirally formed "-portion terminating. ina 1 drive means for said rotary cams; said drive means comprising a seccndshaft, means fordrivingiboth of said shafts in timed relation, armadjustable driving-connections between saidsecond adjacent thelaiis of saidjcam,wherebyirotation oi said gcam forms a loop; inlsaid threadofltshaft and each of said'rotarycams; whereby said rotary cams may be set independently to rotate in timed relation ing needles. i

6L Ina sewing nia c hine loopferming lm'echa nis m for cooperation with a-hooked sewing needie comprising a vertical cam shaft; a'rotary cam carried thereby having a spirally formed portion terminating in a lgenerally arcilate finger 'spaced radially from the-bodyfofsaid cam to provide an open-ended slot, and a thread-renting ing member adapted to substantially-abut said shaft and the underside of said oarn said mam I ber having cemmunicatin'g' thread reoeiving grooves at the side-and tbp adapted to be closed eccentric means beingfadjustablereiatiyetp 'sfaid snait wherebylisaidneedles'wmay'be driven out or ma with each or saidscwl'n needles and mov -f p able forwardly beneathfsald ewing} n ed e t m! pale. a loop drawn thereby through saidfabric':

; drive means fbrsaid loopers includingsaid Iec-f centric means where yeaeh looper cperated'in m d-"r l m as 1 n i 8 ne die; i-forming meanspn the .oppc lte side lot Sa df br a r s eei ih iv i e e n mrr ana new m r t mwlq r i t e d. zm i ilq i0 eni k iu y a aidlh kfi s ng me n aed' to thereafter release sai d thread whereby said sawing needlev ,draw a loop thereof through said iahric; and drive m ans foriisaidtxotaxy .7 mcmbersrsaid drive means commisinaasewnd shattumeansrdrivine saidshafts in; timed rela-.v

Ham andadjustahle driving connections :between' and second-shaftand each of said rotarymeme bmg'whereby said; rotary members may be set Manny; to: rotate in .timed relaticr'if.with- I their cntretpondlngisewing needles.

l, 5; @A *sewinglmachine comprising a lpluraiity of sewing needles recipromble 7 through a mum; to set! a plurality of parailel seams there-- in;; dr.ivej mcans for said sewing-needles ctin' prisling atlqtdrive shaft, and eccentric meansppejr whether-eh for reciprocating said -needles,- said 7 f aein gmu ta ier ism to said needles and loopers.

by the said shaft and said' cam respectively} I V 'luIn a-sewirigmachihe loop forming mechanisrn for cooperation with a hooked sewingneef die comprising-a vertical c'am shaft, a rotary cam, carried thereby having a spirally formed portionterminating in' a "generally iarci'iate fingerspacedaradially from the bodyof said cam to provide an open-ended slot, and a. threadretaining member adapted to substantially abut said shaftand the -underside-of saidcam, said member having communicatingthread-receiving V grooves at'theside andr top adapted to be closed 1 by the said 'shaft andsaid cam respectively, said member beingslidably mounted with respect to a said camshaft tot provide fO IZCXDOSlllG or said grooves to permit threading; A

i 8. In a sewingmachine; loop forming mechanismfor cooperation with a hooked sewing' needle comprising a vertical cam shaft, fifi'OtfllY cam carried thereby having a spirally formed portion terminating in a generallyarcuate f nger spaced radiallyirom the body of said can; to p o d an e en ended lot, andath ead r ta ni g m m ra'dapte'd tc s bstantially a ut said s am and theiinsierside ofsaid s id membe j avinj communicating L thread-receiving ero vc etithe iQe'andtOP. ada teqtobe closed. b chasm sha t nd sa d cam espe tive y. aid member e ng ,s ld y m unted with respect t said carnfsi ai't to provide for exposure of said rooves to pe'imitth leading; and latchflmeans dapted to retain said member-in operating po- 7 A lfip ih adi' wme machine c mprising. I apair'cf drive shafts; means Iorrotatjing said i I s ts, in ti ed mention; a plurality er sets of museme t a hfl fl r ing o ked I a n he band'an:escfli ab e hrea wa y 15 in; separate [drive means intermediate with their corresponding sew 7 ins lo s r;

one. of said; shafts and each of said sets of ele merits, saiddrive means. being adjustable whereing ,looper; separate 7 one of said shafts andeach of said sets of elements, said drivemeans being adjustable wherements, said drive means'being adjustable whereby-said sets of elementssmaybe operated. out of synchronism; loop forming mechanism for each set ofielements; and adjustable drive means connecting each of i said loop forming mechanisms with'said otherzvdrive shaft, whereby said loo-p forming mechanismsmay be, operated out of synchrcnism witheach other and in timed}?- lation to their corresponding sets of elements. 10. A: multiple ,head sewing .inachine comprising apairof drive shaits;,means for rotating said ."shafts, in

i of sewing'elements, each set comprising, a hooked sewing needle and ano-scillatabIe thread-carry separate drive means intermediate by said setsof elementslnay be operated out of synchronism; a loop forming mechanism includ- 'ing ,a rotary member, for each' set oi elements, 7

and adjustable drive means connecting each of said, loop forming. mechanisms with said other drive shaft for continuous, unidirectionaifrota tionthereby, whereby said loop forming mecha nisrns may be operated out of synchronism with each other and in timed relation to their corresponding sets of elements. 7

, -l1. A multiple head sewing machine comprising a pairof' drive shafts;' means for rotating said shafts in timed relation; a'plurality of sets of sewing elements, each set comprising a hooked sewing needle and an oscillatable thread-carryrive means intermediate by saidsetsj of elementsrnay be operated out of synchronism; a loop forming mechanism including aarotary cain'having a spirally formed portion terminating in an arcuateiarm for each set of elen'ie ts, and adjustable drive means j con necting each of said'loop forming mechanisms with said other 1 drive shaft, whereby said loop formingmechanisms may be operated out of synchronism with'each other and in timed relation totheir corresponding sets of elements.

12 In a vsewing machine, a

terminating in a free, arcuate'arm spaced r'a dially from said body todefine therewith an open-ended slot, a'thread guide located adjacent said cam and radially inward from said slot,

whereby rotation of said cam draws'thread from said thread guide across said slot, said needle being movable into said slot so as to hook said thread and draw'the same'into a loop as said free arm is withdrawn therefrom. V

13. In a sewing "machine having a horizontal bed plate upon which a fabric may be advanced;

a rotary cam beneath an'd substantially parallel to the bed plate,.and means adjacent the underside of the cam through which thread maybe s drawnupwardly toward the'fabric onthe'bed' 7 plate, the cam having an arcuate slot'adapted to receive a hooked portion of a vertically re ciprocating needle and provided uponthe outer side of-the slot throughout its length with an arcua'tely extending'arm portion, said slot being closed at one end and open at the other one .cfsaid shafts and. each of said setsfoi' elel- V werally outwardly relative ,to the meansgafore said so that such, thread will extend; on the underside and'transversely across the slot and timed relation; a plurality of sets arm portion; said armlportion havingmeans for positioning the transversely, extending thread into operative engagement withth e hooked por- 1 tion ofmthe needle in the. slotso that'the needle upon its upwardstroke may pull a loop of. said thread ,upwardlythrough bothsjaid slot and the fabric on the bed plate l 1 1 In a ew n mach e h v ho i nta V d'pla u onwhicha ab i ma b ad an ed;

a rotary cam beneath and substantially parallel to the bed plate-and means adjacent'the under side of the cam by which thread may be directed upwardly toward the fabric on the bed plate,

hooked sewing "needle, means for reciprceating :saidneedle, a loop-forming cam, means for rotating said cam in timedrelation to said needle, s'aidcam com- I prising a body having aspirally formed portion the cam having an arcuate, slot adapted to receive a hooked'portion of a vertically reciprocating needle and provided upon the outer side of the slot with an arcuately extendingarm portion, said slot being closed at one end andopen at the other whereby the arm portion has a free end s aid arm portion: being operable during rotation of the cam to move the upwardly di rected thread laterally outward relative to the means aforesaid so thatsuchthreadwill extend on the underside and transversely across the slot and arm portion, saidarm portion having a notch for positioning the transversely xten'ding thread into operativeengagement'with the hooked portion-s of'the' needle in the slot' so that the needle upon its upward strokemay pull a 7 loop of 'said'threadfupwardly through 'boths'aid slot and thefabric" on the bed. plate.

15. In a sewing machine [having abed plate upon which a fabric may be advanced; arotary cam beneath the bedplate, and means adja cent theaxis of'the cam, providing a fixed pas sage'through 'whichthreadmay be drawn up; war'dly toward the fabric 'on the bed plate, the

camlhaving an'arcuate slot adapted to, receive a'. hooked portionbf a vertically reciprocating needlejan'd provided-upon the outer'side -of the, slotwith an arcuately extending arm'portion, said slot being closed atone end and openat the other whereby the arm portion has a free'end,

said arm portion being operable during rotation of the'carn'to 'rnove'the upwardly drawnthre'ad laterally outward relative to the] means "afOre-f said sothat such thread will extend on'the 1m derside and transverselyacross the slot andi'arm portion, [said arm portion" being provided in spaced'r'elation to its free endwith means for positioning the transversely'extending thread into operative engagementwith the hooked portion ofxthe needle in 'the slot so that theneedle upon'its upward stroke may pull a loop of said" thread upwardly through both said slowed the fabric on the bed plate. 4

- 161-111 a 'sewing machine havingahorizontal bedplate-upon which a fabric may'beadvanced;

a rotary cam beneath and substantially parallel to the bedplate, and means'adjacent the 1111 derside of the cam through which thread may bev drawnv upwardly. toward the fabricpn the bed plate, the' camhaving'an arcuate slotadapted to receive" a hooked :portion of 'a lvertically reciprocating needle and providedfuponithe outer sidepf the,slot,throughoutvitsjlengthiwith an arcuately extending arm: portion; said'sloti being closed atone end andopen; at; the other whereby the arm portion has. :a 'freejend,. said.

arm;portion being operable duringrotation :of the cam t0,;move the upwardly drawn 7 thread;

laterally, outwardly relative to, themeans afore: I

its free end with means for versely extending thread into operative engage said sothat such thread will extend on the underside and transversely across theslot and arm" portion, said arm portionhaving means for positioning the transversely extending thread into operative engagement with the hooked portion of the needle in the slot so that the needle upon its upward stroke may pull a loop of said thread upwardlythrough both said slot and the fabric on the bed plate, the free end of the arm portion being upwardly tapered from the underside to the upper side thereof so that the transversely extending thread on the underside of said arm portion may follow the loop as it is drawn upwardly by the needle before the arm portion is disengaged from said thread by the rotating cam. j V

17. In a sewing machine having a bed plate upon which a fabric may beadvanced; a rotary cam beneath the bed plate, and means adjacent the axis of the cam providing a fixed passage through which thread may be drawn upwardly toward the fabric on the bed plateflthe cam having an arcuate slot adapted to receive ahooked' portion of a verticallyreciprocating needle and provided upon the outer side of the slot with an arcuately extending arm portion, said slot being closed at one end and open at the other whereby the arm portion has a free end, said arm portion being operable during rotation of the cam to move the upwardly drawn thread laterally out ward relative to the means aforesaidso that such thread will .extendon the undersideand trans;- versely across the slot and armfportion, said arm portion being provided in spaced relation to positioning the transment with the hooked portion of the needle in the slotso that the needle upon its upward stroke arm portion, said arm, portion having a-notch for positioningthe transversely extending thread into operative engagement with the hooked portion of the needle in the slot so that the needle provided upon the outer side of the slot with an arcuately extending armportion, said slot being closed at one 'endand open at the other whereby the arm portion has a free end, said arm portion being operable during rotation of the cam to move theupwardly drawn thread laterally outward relative to themeans aforesaid so that such thread will extend on the underside andtrans verselyracross the slot and arm portion, said arm portionbeing provided in spaced relation to its free end with means for positioning the transversely extending thread into operative enmay pull a loop, of said thread upwardly through both said slot and the'fabric on the bed plate, the arm portion being, upwardly tapered at its free end to permit thetransverselyextending thread on the underside of the arm *portionto follow the loop as it is drawn upwardly by; the

needle before the arm portion is disengaged from said thread by the rotating cam.

-18. In a sewing machine having a horizontal bed plate upon which a fabric maybe advanced;

a rotary cam beneathand substantially parallel to'the bed plate, andmeans adjacent the underside of the cam by which thread maybe directed the camhaving an arcuate slot adapted to receive a hooked portion of a vertically reciprocating needle and providedupon the outer side of the slot with an arcuately extending arm por- "tion, said slot being closed at one end and open at the other whereby the arm portion has a free end, said arm portion being operable during rotation of the cam to move the upwardly directed thread laterally outward relative'to the means aforesaid so that such thread will extend on the underside and transverselyacross theslot and upwardly toward the fabric on the bed plate,

gagement with theh'ooked portion of the needle 7 .in the slot so. that the needle upon its upward stroke may pull a loop of said thread upwardly through both said slotand the fabric on. the bed plate, and drive means for imparting-unidirec- .jtional rotation to said camin timed relation to t the, reciprocation of said needle;

20. In a sewing machine having a bed plate upon which a fabric may be advanced; a rotary cam beneath the bed plate, and means adjacent the underside of the cam providing a fixed passage by whichthread may be directed upwardly toward the fabric on the bed plate, the-cam having an arcuate slot adapted to receive a hooked portion of a vertically out substantially its length with an arcuately ex tending arm portion, said slot being closed at one end and open at the other whereby the arm portion has a free end, said arm portion being operable during rotation of the cam to move the upwardly directed thread laterally outward relaso that'such thread will extend onthe underside and transversely tiveto the means aforesaid across the slot and arm portion, said arm por-' tion being provided in spaced relation to its free. end with a notch for positioning the transverselyextending thread into operative engagement with the hooked portion of the needle in the slot so that the needle upon its upward stroke may pull a loop of said thread upwardly through both saidslot and the fabric on the bed plate.

CLARENCE J. DAVIES;

reciprocating needle and provided upon the outer side of the slot through- 

